The Model 1851 Navy is one of the most significant firearms in the history of Colt firearms and was the second most popular of all Colt percussion firearms after only the Model 1849 Pocket, and shared the longest production run of 1850-1873 with the latter. This early Navy was manufactured in 1850, the first year of production, and has the standard features for the Second Model which has the wedge under the screw unlike the First Model and retains the squareback trigger guard of the First Model. Only approximately 3,000 of these revolvers are estimated to have been manufactured given the serial number range of 1250-4200 includes some of the early Third Model revolvers. It has matching serial numbers, including in the back strap mortise of the grip (faint).